Sexually Antagonistic Selection in Human Male Homosexuality
(A) Output (ii) for model (1b) - overdominance on autosome: sexual-orientation asymmetries, as functions of γ (for α = 1.4). Ratio between the predicted proportions of male homosexuals in the matriline vs. the patriline of homosexuals (red-dashed plot), and the same for heterosexuals (blue-dashed plot); ratio between the predicted proportions of male homosexuals in the matriline of homosexuals vs. the matriline of heterosexuals (red-dotted plot), and the same for the patriline (blue-dotted plot). (B) Output (i) for model (2b) - sexually antagonistic X-linked locus: equilibrium proportion η of homosexuals as a function of γ, for varying values of α (red plot: α = 1.2; green plot: α = 1.8; blue plots: 1.2<α<1.8). (C) Same output (i) for model (3a) - maternal selection on autosome.